<?php
class util {
	
	//将秒时间转化为小时：分钟
	public function secondToHour($time) {
		$minute=$time%60;
		$hour = intval($time/60);
		if($minute>0)
			$minute = $minute.'分钟';
		else 
			$minute='';
		
		if($hour>0)
			$hour = $hour."小时";
		else
			$hour='';
		if($hour==''&&$minute=='')
			return '0分钟';
		else
			return $hour.$minute;
	}
	
	//获取毫秒
	function getMilliSecond()
	{
		$time = explode (" ",microtime());
		$time = $time[1].substr($time[0],2,3);
		return $time;
	}
	
	//
	function randString($length=8) {
		// 密码字符集，可任意添加你需要的字符
		$chars ='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
		$password ='';
		for ( $i = 0; $i < $length; $i++ ) {
			// 这里提供两种字符获取方式
			// 第一种是使用 substr 截取$chars中的任意一位字符；
			// 第二种是取字符数组 $chars 的任意元素
			// $password .= substr($chars, mt_rand(0, strlen($chars) – 1), 1);
			$password .= $chars[ mt_rand(0, strlen($chars) - 1) ];
		}
		return $password;
	}
	
	//返回单个汉字的拼音首字母,支持GBK和UTF8编码
	function getfirstchar($s0){
		$fchar = ord($s0{0});
		if($fchar >= ord("A") and $fchar <= ord("z") )return strtoupper($s0{0});
		//$s1 = iconv("UTF-8","gb2312", $s0);
		//$s2 = iconv("gb2312","UTF-8", $s1);
		//if($s2 == $s0){$s = $s1;}else{$s = $s0;}
		$s = $s0;
		$asc = ord($s{0}) * 256 + ord($s{1}) - 65536;
		if($asc >= -20319 and $asc <= -20284) return "A";
		if($asc >= -20283 and $asc <= -19776) return "B";
		if($asc >= -19775 and $asc <= -19219) return "C";
		if($asc >= -19218 and $asc <= -18711) return "D";
		if($asc >= -18710 and $asc <= -18527) return "E";
		if($asc >= -18526 and $asc <= -18240) return "F";
		if($asc >= -18239 and $asc <= -17923) return "G";
		if($asc >= -17922 and $asc <= -17418) return "H";
		if($asc >= -17417 and $asc <= -16475) return "J";
		if($asc >= -16474 and $asc <= -16213) return "K";
		if($asc >= -16212 and $asc <= -15641) return "L";
		if($asc >= -15640 and $asc <= -15166) return "M";
		if($asc >= -15165 and $asc <= -14923) return "N";
		if($asc >= -14922 and $asc <= -14915) return "O";
		if($asc >= -14914 and $asc <= -14631) return "P";
		if($asc >= -14630 and $asc <= -14150) return "Q";
		if($asc >= -14149 and $asc <= -14091) return "R";
		if($asc >= -14090 and $asc <= -13319) return "S";
		if($asc >= -13318 and $asc <= -12839) return "T";
		if($asc >= -12838 and $asc <= -12557) return "W";
		if($asc >= -12556 and $asc <= -11848) return "X";
		if($asc >= -11847 and $asc <= -11056) return "Y";
		if($asc >= -11055 and $asc <= -10247) return "Z";
		return null;
	}
	
	//取得一串汉字的拼音首字母
	function pinyin($zh){
		$ret = "";
		$s1 = iconv("UTF-8","gb2312", $zh);
		$s2 = iconv("gb2312","UTF-8", $s1);
		if($s2 == $zh){$zh = $s1;}
		for($i = 0; $i < strlen($zh); $i++){
			$s1 = substr($zh,$i,1);
			$p = ord($s1);
			if($p > 160){
				$s2 = substr($zh,$i++,2);
				$ret .= $this->getfirstchar($s2);
			}else{
				$ret .= $s1;
			}
		}
		return $ret;
	}
	
	
}